龙头选购指南

走进建材城,各式各样的龙头让人眼花缭乱,款式有手按的、提拉的、旋转的、脚踏的、混水的、自动感应的很多种,适用地点还各不相同,价格也参差不齐,要想从中选购一款合适自己的产品还真不容易,所以请看以下选购龙头的小指南,希望能给你一些帮助。     

冬季肌肤养护

白皙美丽的肌肤是所有女性梦寐已求的,只有保养好内层肌肤,表面的肌肤才能健康美丽。健康的内层肌肤对美化表面肌肤至关重要。随着冬季的来临,由于温度和湿度的变化,皮肤新陈代谢的速度减慢,使皮肤保留水份的能力降低,因此皮肤变得很干。而新陈代谢减慢,又会导致受伤的皮肤细     

爱的那朵云

一、遗失的手套段小苏:初春的午后,我将满满两抽屉的手套整理出来,洗净,晾晒,那一排排粉红、浅蓝、鹅黄、草绿、雪白的手套吸引了对面楼里那个扎着好多辫子的小女孩,她趴在阳台上,用兴奋的语调问我:姐姐,你的那些漂亮手套为什么只有一只呢,它们的另一半呢?它们的另一半被我落在了夏宇的口袋里。以前,每次让他把手套还给我的时候,     

2009绿色中国年度焦点人物公益奖

总政歌舞团著名青年歌唱演员、国家一级演员蔡国庆获奖感言:这样的时刻在我心中是充满真情和温暖的,因为我始终坚信绿色的中国才是一个更加和谐美丽的中国。我愿意作军中的一棵小白杨,我希望用我的爱心和歌声守护祖国每一片绿色的森林和我们心中绿色的家园。     

十月赞歌

总是在初秋的时候,就充满了对十月的憧憬;总是在金秋的季节,就充满了对十月的渴望。穿过季节的群山,我们以热烈的心跳去拥抱十月旭日的第一缕曙光。越过岁月的河流,我们的心境犹如十月天空第一片柔美耀眼的云裳。     

08香水风尚

香水,这种神奇的化妆品,能带给女人自信和欣喜,它可以愉悦你的心情、平衡你的情绪、表达你的心意、体现你的气质、协调你与周围环境的关系。难怪有人说,一个真正懂得美的女人一定是一个选择和使用香水的高手。的确,香水是造就一个女人整体美的必备单品。本季,各大香水品牌又纷纷推出新品,给爱美的女人更多选择的机会。雅诗兰黛Sensuous系列     

留给后人的不仅是青山

绵延的绿海,茂密的树林,潺潺的溪水,是刚刚离开这个世界的杨善洲留下的最直观的宝贵财富。同时,他还留给我们更多的宝藏。这些宝藏中最重要的,是他为党和人民的事业奋斗终生的精神。从领导的位子上退下来后,     

五月槐花香

喜欢五月的味道,因为五月的阳光下流光溢彩着各色的神奇,空气中也都逸动着各色花蕊的甜香气息。喜欢五月的满眼新绿,因为生物都舒展开自身的躯体,展现出了生命的蓬勃生机,并把生命的活力化为最为眩目灿烂的美丽。五月里,无论是多么柔弱的生命,都会毫不掩饰自身的美质,都会涂抹装点着春光明丽的斑斓和尽情渲染着绿色的柔情欣喜。     

小巷的记忆

在记忆里,家乡的小巷充满着平凡的快乐,给我的童年留下滚烫的记忆。家乡的小巷很窄,小巷两边挤满住户,屋檐相接,错落有致,挤出了中间一条弯弯曲曲的小路,延伸着我的记忆。家乡的小巷很长,铺一路的碎石或石板,那里有我童年时代的嬉笑,有我少年时代的初恋,有我离别时的留恋。     

幼小心灵中的自然

人与自然的和谐相处,是生态文明中的重中之重。建设生态文明不是一代人的事情,而是要人类世代相传。那么,在我们的下一代人心目中是如何看待人和自然的关系呢?我们在这里选发了三篇小学生的文章,让读者从中去感受稚嫩心灵对自然界的认识,这是人与自然和谐相处的根基,也是人类未来的希望所在。     

海巴戟天的栽培及其利用

介绍了药用植物海巴戟天的自然分布、形态特征、栽培管理和病虫害的防治技术,报道了海巴戟天的 药用历史和现代医学研究结果以及产品开发现状,提出种植开发利用建议。     

诺丽果结果量与生长势因素相关性分析

文章以海南省林业科学研究所云龙种苗基地15月生诺丽果林6个样方共36株为观测对象,分别以树高、地径、平均冠幅、分枝数为生长势指标,探讨各项指标与诺丽果结果量的相关性,通过总体相关性方差分析结果表明：诺丽果树高、地径和冠幅大小对结果量的影响达到极显著水平,分枝数对结果量的影响达到显著水平。在此基础上,采用进入和逐步回归分析法进行分析,建立树高、地径、平均冠幅、分枝数预测诺丽果结果量方程模型为y：=-72.584-0.015x1＋25.127x2＋0.352 x3-1.004 x4或y=-72.561＋24.854 x2＋0.346 x3-1.001 x4,对预测诺丽果结果量具有科学参考价值,可为评价诺丽果种植水平及诺丽果产品开发和市场拓展提供科学决策依据。     

海巴戟的生物学特性及引种栽培技术

于2001年从泰国引种海巴戟至西双版纳热带植物园．文章介绍了该树种的植物学及生态学特性．引种3a观察,其年均高生长1．79m,胸径年生长3．75cm,第二年现蕾结果．介绍了引种栽培技术及病虫害防治．海巴戟是一种新型保健药品,具有广阔的市场前景和开发价值．     

Antimicrobial activity of some Sri Lankan Rubiaceae and Meliaceae

Ninety solvent extracts (n-hexane, dichloromethane and methanol) obtained from the leaves, bark and stem of 13 Sri Lankan Rubiaceae and two Sri Lankan Meliaceae plants have been screened for antibacterial and antifungal activities. Morinda tinctoria, Mussaenda frondosa, Psychotria gardneri and Psychotria stenophylla displayed the widest spectrum of antibacterial activity.     

Purgative effect of the methanol extract of Morinda lucida

The purgative effect of a methanol extract of the leaves of Morinda lucida is reported. The oral treatment (12.5–100 mg/kg) caused a pronounced increase in the number of wet faeces in rats and a potentiated castor oil-induced diarrhoea in mice.     

Antimicrobial anthraquinones from Morinda angustifolia

Investigation on Morinda angustifolia resulted in the isolation of a new anthraquinone, 1,8-dihydroxy-2-methyl-3,7-dimethoxyanthraquinone (1), along with five known analogues, lucidin 3-O-beta-primeveroside (2), 1,3-dihydroxy-2-methylanthraquinone (3), lucidin- omega -ethyl ether (4), lucidin-omega-butyl ether (5) and damnacanthol (6). The new compound demonstrated significant antimicrobial activity against Bacillus subtilis, Escherichia coli, Micrococcus luteus, Sarcina lutea, Candida albicans and Saccharomyces sake.     

Chemical components of the roots of Noni (Morinda citrifolia) and their cytotoxic effects

Roots of Morinda citrifolia (Noni or Yor in Thai) have been used traditionally for thousands of years to treat chronic diseases such as cancer and heart disease. In this study, three new anthraquinones together with 15 known compounds were isolated from the roots of M. citrifolia (Rubiaceae). Their structures were established by spectroscopic methods, particularly 1D and 2D NMR techniques. Six known compounds, together with two new compounds (2 and 3) showed significant inhibitory effects on the proliferation of human lung and colon cancer cells.     

Morinda lucida extract induces endothelium-dependent and -independent relaxation of rat aorta

The effect of an aqueous extract of Morinda lucida (ML) on vascular tone was tested using rat aortic rings precontracted with noradrenaline (10(-7) mol/l). Relaxation responses were determined with endothelium-intact, L-NAME-treated, methylene blue-treated and endothelium-denuded tissues. In the concentration range of 0.25-9.0 mg/ml, ML elicited vasorelaxation in noradrenaline-precontracted rings. This relaxation response was partially attenuated by removal of the endothelium, and completely inhibited by pretreatment of rings with L-NAME and methylene blue. Thus, ML-induced relaxation of vascular smooth muscle occurs via endothelium-dependent and -independent mechanisms, the former of which involves the nitric oxide-cGMP pathway.     

Interspecific variation in xylem vulnerability to cavitation among tropical tree and shrub species

In tropical moist forests, seasonal drought limits plant survival, productivity and diversity. Drought-tolerance mechanisms of tropical species should reflect the maximum seasonal water deficits experienced in a particular habitat. We investigated stem xylem vulnerability to cavitation in nine tropical species with different life histories and habitat associations. Stem xylem vulnerability was scored as the xylem water potential causing 50 and 75% loss of hydraulic conductivity (P50 and P75, respectively). Four shade-tolerant shrubs ranged from moderately resistant (P50=-1.9 MPa for Ouratea lucens Kunth. Engl.) to highly resistant to cavitation (P50=-4.1 MPa for Psychotria horizontalis Sw.), with shallow-rooted species being the most resistant. Among the tree species, those characteristic of waterlogged soils, Carapa guianensis Aubl., Prioria copaifera Griseb. and Ficus citrifolia Mill., were the most vulnerable to cavitation (P50=-0.8 to -1.6 MPa). The wet-season, deciduous tree, Cordia alliodora (Ruiz and Pav.) Oken., had resistant xylem (P50=-3.2 MPa), whereas the dry-season, deciduous tree, Bursera simaruba (L.) Sarg. was among the most vulnerable to cavitation (P50=-0.8 MPa) of the species studied. For eight out of the nine study species, previously reported minimum seasonal leaf water potentials measured in the field during periods of drought correlated with our P50 and P75 values. Rooting depth, deciduousness, soil type and growth habit might also contribute to desiccation tolerance. Our results support the functional dependence of drought tolerance on xylem resistance to cavitation.     

Indigenous agroforestry of Pohnpei

Plant species and cultivars of the indigenous agroforestry system of Pohnpei were surveyed in transects through 54 randomly-selected farms. The agroforestry system was characterized by extensive cultivation of yams (Dioscorea), aroids (Alocasia), and Piper methysticum under a permanent overstory of breadfruit, coconut, and forest remnant trees and a middle canopy of Hibiscus tiliaceus, Musa spp., and Morinda citrifolia. In the 10 ha of survey plots, 161 species were found, of which 102 were trees, shrubs, and crops and 59 were uncultivated herbaceous plants. Numbers of tree, shrub, and crop species per farm ranged from 16 to 37 with an average of 26. Twenty-eight breadfruit and 38 yam cultivars were found in the survey plots, showing that cultivar diversity is an important component of the biological diversity maintained and utilized in Pohnpeian agroforests.